Key signature -. The flats and sharps at the beginning of each staff line indicating the key of music the piece is to be played. Klangfarbenmelodie -. The technique of altering the tone color of a single note or musical line by changing from one instrument to another in the middle of a note or line.
There are many diagnoses that do not have definitive tests used to determine them, or which can't be truly diagnosed until a patient has died (upon autopsy). In these cases, doctors must use combinations of symptoms, often vague symptoms, which can lead to a lack of diagnosis. The real medical problem may be highly unusual or not appropriate to the age of the patient. The doctor might not consider a diagnosis that is very rare, or very rare for that age of the patient.
2. not clearly perceptible or discernible; indistinct: a vague idea; a vague shape. 3. not clearly or definitely established or known: a vague rumour. 4. (of a person or his expression) demonstrating lack of precision or clear thinking; absent-minded. [C16: via French from Latin vagus wandering, of obscure origin].